﻿STRUCTURE 
  OF 
  THE 
  OVARY. 
  201 
  

  

  in 
  Anabrus 
  only, 
  Fig. 
  Gl, 
  Tu, 
  continuous 
  with 
  the 
  tunica 
  externa 
  of 
  the 
  

   cord 
  ch. 
  The 
  appearance 
  of 
  the 
  tunic 
  is 
  represented 
  at 
  Tu, 
  the 
  rest 
  of 
  

   Fig. 
  Gl 
  being 
  drawn 
  with 
  the 
  objective 
  focused 
  lower. 
  The 
  membrane 
  

   is 
  thin, 
  delicate, 
  and 
  entirely 
  distinct 
  from 
  the 
  follicular 
  epithelium, 
  

   which 
  has 
  shrunk 
  away 
  from 
  it, 
  as 
  seen 
  in 
  the 
  figure. 
  The 
  external 
  

   tunic 
  is 
  very 
  transparent, 
  and 
  contains 
  more 
  or 
  less 
  nearly 
  oval, 
  flattened 
  

   nuclei, 
  with 
  no 
  distinct 
  outline 
  or 
  apparent 
  nucleolus, 
  and 
  containing 
  a 
  

   single 
  layer 
  of 
  fine 
  granules, 
  all 
  of 
  which 
  are 
  darkly 
  stained 
  by 
  hsema- 
  

   toxiline. 
  Apparently 
  every 
  granule 
  lies 
  by 
  itself, 
  and 
  is 
  separated 
  from 
  

   its 
  fellows 
  by 
  a 
  clear 
  space, 
  only 
  very 
  slightly 
  tinged 
  by 
  the 
  logwood. 
  

   Toward 
  the 
  upper 
  end 
  of 
  the 
  tube 
  the 
  nuclei 
  are 
  smaller 
  and 
  lie 
  closer 
  

   together. 
  They 
  lend 
  a 
  peculiar 
  character 
  to 
  the 
  tunic, 
  and 
  remind 
  one 
  of 
  

   the 
  similar 
  nuclei 
  in 
  the 
  tunica 
  externa 
  of 
  the 
  spermatic 
  tubes 
  of 
  locusts. 
  

  

  The 
  peculiar 
  net-work 
  of 
  connective 
  tissue 
  which 
  surrounds 
  the 
  ovary, 
  

   and 
  which 
  is 
  represented 
  in 
  Figs. 
  17 
  and 
  62, 
  has 
  already 
  been 
  described. 
  

  

  Anterior 
  caecum 
  of 
  the 
  oviduct. 
  — 
  By 
  this 
  name 
  I 
  designate 
  the 
  narrow 
  

   convoluted 
  anterior 
  prolongation 
  of 
  the 
  oviduct 
  in 
  locusts, 
  which 
  Dufour 
  275 
  

   calls 
  the 
  u 
  boyau 
  borgne 
  et 
  flexueux, 
  qui 
  termine 
  l'ovaire 
  en 
  avant," 
  and 
  

   which 
  is 
  represented 
  on 
  his 
  Plate 
  II, 
  Fig. 
  18 
  c. 
  In 
  a 
  transverse 
  section 
  

   through 
  the 
  middle 
  of 
  the 
  abdomen, 
  the 
  two 
  casca 
  are 
  cut 
  across 
  sev- 
  

   eral 
  times, 
  ovd, 
  in 
  Fig. 
  1. 
  It 
  is 
  then 
  seen 
  that 
  they 
  are 
  tubes 
  with 
  thick 
  

   walls 
  and 
  a 
  cavity 
  of 
  moderate 
  size. 
  The 
  main 
  thickness 
  of 
  the 
  wall 
  is 
  

   made 
  up 
  by 
  the 
  epithelium, 
  the 
  real 
  character 
  of 
  which 
  is 
  obscure 
  in 
  my 
  

   preparations, 
  there 
  being 
  a 
  grait 
  many 
  oval 
  nuclei 
  scattered 
  through 
  it 
  

   at 
  all 
  levels, 
  while 
  the 
  limits 
  of 
  the 
  single 
  cells 
  do 
  not 
  appear. 
  Outside 
  

   the 
  epithelium 
  is 
  a 
  distinct 
  but 
  thin 
  layer 
  formed 
  by 
  the 
  connective 
  tis- 
  

   sue, 
  tracheae, 
  and 
  muscular 
  fibres, 
  which, 
  as 
  far 
  as 
  I 
  can 
  make 
  out, 
  seem 
  

   to 
  run 
  circularly. 
  It 
  is 
  very 
  possible 
  that 
  in 
  better 
  preparations 
  longi- 
  

   tudinal 
  fibres 
  will 
  be 
  likewise 
  found. 
  

  

  Uterus 
  of 
  locusts. 
  — 
  I 
  employ 
  this 
  name 
  to 
  designate 
  the 
  enlarged 
  

   upper 
  end 
  of 
  the 
  oviduct, 
  or 
  that 
  division 
  which 
  Dufour 
  in 
  his 
  classical 
  

   memoir 
  calls 
  the 
  " 
  calice." 
  276 
  Of 
  this 
  organ 
  I 
  have 
  obtained 
  some 
  very 
  

   beautiful 
  preparations 
  from 
  (Edipoda 
  sordida. 
  If 
  the 
  whole 
  uterus 
  just 
  

   before 
  the 
  egg^ 
  descend 
  into 
  it 
  be 
  hardened 
  in 
  alcohol 
  and 
  then 
  exam- 
  

   ined, 
  it 
  will 
  be 
  found 
  to 
  be 
  compressed 
  laterally. 
  With 
  a 
  very 
  sharp 
  

   razor 
  it 
  may 
  then 
  be 
  cut 
  in 
  halves, 
  so 
  as 
  to 
  obtain 
  two 
  flat 
  pieces 
  ; 
  some 
  

   granular 
  matter 
  and 
  coagulated 
  secretions 
  will 
  be 
  found 
  adherent 
  to 
  

   the 
  inner 
  surface, 
  which 
  may 
  be 
  removed 
  under 
  alcohol 
  by 
  the 
  careful 
  

   use 
  of 
  a 
  camel's 
  hair 
  brush. 
  The 
  piece 
  may 
  then 
  be 
  colored 
  with 
  haerna- 
  

   toxiline, 
  and 
  mounted, 
  with 
  the 
  inner 
  surface 
  upwards, 
  in 
  Canada 
  

   balsam. 
  Part 
  of 
  such 
  a 
  preparation 
  is 
  represented 
  in 
  Fig. 
  21. 
  The 
  in- 
  

   ner 
  surface 
  is 
  seen 
  to 
  be 
  lined 
  by 
  a 
  beautiful 
  epithelium, 
  which 
  is 
  thrown 
  

   up 
  into 
  broad 
  transverse 
  folds, 
  with 
  intervening 
  depressions 
  of 
  about 
  

  

  ^Iteclierches 
  Anatomiques 
  et 
  pkysiologiques 
  sur 
  les 
  Orthoptexea 
  Memoires 
  al'Acad. 
  R. 
  des 
  ScL 
  

   Inst. 
  France, 
  1834, 
  p. 
  324. 
  

   276 
  Dufour: 
  1. 
  c. 
  Planche 
  IT., 
  fig. 
  13. 
  

  

  